CN104421770B - A kind of backlight module and display device - Google Patents
A kind of backlight module and display device Download PDFInfo
- Publication number
- CN104421770B CN104421770B CN201310412311.4A CN201310412311A CN104421770B CN 104421770 B CN104421770 B CN 104421770B CN 201310412311 A CN201310412311 A CN 201310412311A CN 104421770 B CN104421770 B CN 104421770B
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- Prior art keywords
- light
- backlight module
- scattering
- light source
- emitting window
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Abstract
The present invention discloses a kind of backlight module and display device, is related to technical field of liquid crystal display, is in the case where not reducing light source light-emitting efficiency, reduces backlight module thickness and invent.The backlight module, including light guide plate and light source, the light guide plate includes scattering surface, exiting surface and incidence surface, the light source is arranged on same plane with the light guide plate, the light source includes light-emitting window, the light-emitting window is set towards the light guide plate, it is relative with the incidence surface, the light-emitting window projects direction along the source light and gradually increased, and the light-emitting window is obliquely installed to the scattering surface or the light-emitting window is obliquely installed to the exiting surface and the exiting surface is provided with the catoptric arrangement that can reflex to the light that the light source is sent on the scattering surface.Backlight module of the present invention is used for liquid crystal display device.
Description
Technical field
The present invention relates to technical field of liquid crystal display, more particularly to a kind of backlight module and display device.
Background technology
Lcd technology has been widely used in the electronics such as computer screen, mobile phone, digital camera, DV, PDA
Product, liquid crystal panel are crucial display modules, but itself is not luminous, it is necessary to set backlight module just to be shown
Show, backlight module fits together with liquid crystal panel and forms a complete liquid crystal display device.
As shown in figure 1, existing backlight module generally comprises light guide plate 1 and light source 2, the light-emitting window 21 of light source 2 is to set vertically
Put, to improve luminous efficiency, it is necessary to using the larger light source 2 of light-emitting window 21, light guide plate 1 and light source that thickness is larger are needed for this
2 coordinate, and this is unfavorable for realizing the lightening of backlight module, if to reduce backlight module thickness, need to reduce going out for light source 2
Optical port 21, to coordinate frivolous backlight module, but this can make the luminous efficiency reduction of light source 2 cause energy loss, so as to influence
The display effect of liquid crystal display device.
The content of the invention
Embodiments of the invention provide a kind of backlight module and display device, can not reduce the situation of light source light-emitting efficiency
Under, reduce backlight module thickness.
To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
A kind of backlight module, including light guide plate and light source, the light guide plate include scattering surface, exiting surface and incidence surface, institute
State light source and the light guide plate to be arranged on same plane, the light source includes light-emitting window, and the light-emitting window is towards the leaded light
Plate set, it is relative with the incidence surface, the light-emitting window along the source light project direction gradually increase, the light-emitting window to
The scattering surface is obliquely installed, or the light-emitting window to the exiting surface be obliquely installed and the exiting surface be provided with can will described in
The catoptric arrangement backlight module provided in an embodiment of the present invention that the light that light source is sent is reflexed on the scattering surface,
Further, the scattering surface includes the scattering region being made up of some scattering points.
Further, the catoptric arrangement close light source side on exiting surface, and it is arranged at the scattering
Beyond drop shadow spread of the region on the exiting surface.
Further, the scattering region is completely covered in the light that the catoptric arrangement reflects.
Specifically, the catoptric arrangement is reflector plate or reflectance coating.
Further, the light-emitting window includes light-emitting face, and the light-emitting face is parallel with the incidence surface.
Further, groove is provided with close to the light source side on the exiting surface, the catoptric arrangement is arranged at described
In groove.
Further, the upper surface of the catoptric arrangement is without departing from the exiting surface.
Another aspect of the present invention embodiment additionally provides a kind of display device, including the back of the body described in any of the above technical scheme
Optical mode group.
The backlight module that embodiments of the invention provide, can by the way that the light-emitting window is obliquely installed to the scattering surface
The light that light source is sent is radiated at by the incidence surface on the scattering surface, light is penetrated from the exiting surface by scattering
Go out；By the way that the light-emitting window to be obliquely installed to and set on the exiting surface can send the light source to the exiting surface
The catoptric arrangement that light is reflexed on the scattering surface, exiting surface described in the light directive that the light source sends and described can be made
Catoptric arrangement is reflexed on the scattering surface, light is projected from the exiting surface after being scattered, because light-emitting window is obliquely installed,
And the light-emitting window projects direction along the source light and gradually increased so that can make the light without reducing the light-emitting window
The thickness in source reduces, so that the thickness of the light guide plate coordinated with the light source can also reduce, due to no reduction light-emitting window, institute
The luminous efficiency for stating light source does not reduce, and thus achieves in the case where not reducing light source light-emitting efficiency, reduces backlight mould
The thickness of group, be advantageous to manufacture more frivolous display device.
Brief description of the drawings
Fig. 1 is the structural representation of existing backlight module；
Fig. 2 is the light-emitting window of backlight module of the embodiment of the present invention to a kind of inclined structural representation of embodiment of scattering surface
Figure；
Fig. 3 is Fig. 2 top view；
Fig. 4 is the light-emitting window of backlight module of the embodiment of the present invention to a kind of inclined structural representation of embodiment of exiting surface
Figure；
Fig. 5 is structural representation of the light-emitting window of backlight module of the embodiment of the present invention to the inclined another embodiment of scattering surface
Figure.
Embodiment
Backlight module of the embodiment of the present invention, display device are described in detail below in conjunction with the accompanying drawings.
In the description of the invention, it is to be understood that term " " center ", " on ", " under ", "front", "rear", " left side ",
The orientation or position relationship of the instruction such as " right side ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are based on shown in the drawings
Orientation or position relationship, be for only for ease of the description present invention and simplify description, rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Reference picture 2, Fig. 3, Fig. 4, Fig. 5, backlight module of the present invention, including light guide plate 1 and light source 2, light guide plate 1 wrap
Scattering surface 13, exiting surface 11 and incidence surface 12 are included, light source 2 is arranged on same plane with light guide plate 1, and light source 1 includes light-emitting window
21, light-emitting window 21 is set towards light guide plate 1, relative with incidence surface 12, and light-emitting window 21 projects direction along source light and gradually increased,
Light-emitting window 21 is obliquely installed to scattering surface 13, or light-emitting window 21 is obliquely installed to the exiting surface 11 and set on the exiting surface 11
There is the catoptric arrangement 4 that the light that the light source 2 is sent can be reflexed on the scattering surface 13.
The backlight module that embodiments of the invention provide, reference picture 4, by by the light-emitting window 21 to the scattering surface 13
It is obliquely installed, the light that light source 2 is sent can be made to be radiated at by the incidence surface 12 on the scattering surface 13, make light by scattering
Line projects from the exiting surface 11；Reference picture 2, Fig. 3, Fig. 5, by the way that the light-emitting window 21 is obliquely installed to the exiting surface 11
And the catoptric arrangement 4 that can reflex to the light that the light source 2 is sent on the scattering surface 13 is set on the exiting surface 11,
The light directive exiting surface 11 that light source 2 is sent can be made and reflexed to by the catoptric arrangement 4 on the scattering surface 13, after being scattered
Light is set to be projected from the exiting surface 11, comparison diagram 1 and Fig. 2 can be seen that, light-emitting window width in the embodiment of the present invention and existing
Light-emitting window width in technology is h, and because light-emitting window 21 is obliquely installed, and the light-emitting window 21 is penetrated along the light of light source 2
Outgoing direction gradually increases, and the length for the in the vertical direction of light-emitting window 21 being obliquely installed is less than the light-emitting window 21 being vertically arranged perpendicular
The upward length of Nogata, and then the thickness H1 of light source 2 in the case where the width h of light-emitting window 21 is constant, can be made to be less than existing skill
Light source thickness H in art, and then the thickness for the light guide plate 1 for making to coordinate with the light source 2 can also reduce with the thickness of the light source 2
And reduce, due to no reduction light-emitting window 21, the luminous efficiency of the light source 2 does not reduce, thus achieves and do not reducing light
In the case of the luminous efficiency of source 2, the thickness of backlight module is reduced, is advantageous to manufacture more frivolous display device.
Scattering surface 13 can scatter to the light that light source 2 is sent exiting surface, then be projected by exiting surface 11, and scattering surface 13 can be
Various structures, for example, some scattering points 3 can be set in scattering surface 13, scattering point 3 can be bulge-structure, affiliated bulge-structure
Section can be polygon or circular arc type, be arranged in netted on scattering surface 13, the mode that scattering point 3 can print is imprinted on scattering surface
On 13, it is also possible to which when light guide plate shapes, direct forming is on scattering surface 113 by scattering point 3 for non-printing mode, due to scattering
Point 3 can be various shapes, and in net distribution on scattering surface 13, the scattering point 3 can be scattered from multiple directions light simultaneously
Light is scattered into all directions, and by the scattering between each scattering point, light is transmitted between each scattering point, so as to
Scattering surface 13 is covered, the light utilization that multiple light courcess 2 is sent is improved, makes the light for scattering to exiting surface 11 more uniform.
In order to improve the illumination effect of backlight module, catoptric arrangement 4 can be located on exiting surface 11 close to the light source 2 one
Side, and be arranged at beyond drop shadow spread of the scattering region on the exiting surface 11, it thus can avoid dissipating from scattering region
The light for being mapped to exiting surface 11 is launched structure 4 and reflected, and reduces the light-emitting area of exiting surface 11, influences the luminous effect of backlight module
Fruit.
In order that more uniform from 11 irradiant brightness of exiting surface, can by adjust light-emitting window 21 angle of inclination,
The scattering region, light source is completely covered in the light that the position of the thickness of light guide plate 1 and catoptric arrangement 4 reflects catoptric arrangement 4
The light sent can be radiated at whole scattering regions after catoptric arrangement reflects, and thus whole scattering points 3 of scattering region all may be used
The light that sends of scattering light source 2, make the light that is projected after being scattered by exiting surface 11 more uniform.
Catoptric arrangement 4 can be various structures, preferably reflector plate or reflectance coating, and the reflectance coating can be covered in exiting surface 11,
Because the reflectance coating is only thin film structure, therefore, the thickness of backlight module can be reduced；The reflector plate can be overlapped on out
In smooth surface 11 and light source 2 or one end is arranged at exiting surface 11, and one end is cantilever, easy for installation, can easily be accommodated position.
To make back light module unit structure compact, light-emitting window 21 may include light-emitting face 22, and light-emitting face 22 can be with incidence surface 12
It is parallel, thus light-emitting face 22 and incidence surface 12 can be arranged close to, and make light-emitting face 22 and the gap uniformity of incidence surface 12, from
And light source so as to reduce backlight module width, and can make back light module unit structure compacter close to allowing smooth surface to set.
Reference picture 4, in order to further reduce the thickness of backlight module, it can be opened up on exiting surface 11 close to the side of light source 2
Groove 5, catoptric arrangement 4 can be arranged in groove 5, thus catoptric arrangement 4 can be embedded in exiting surface 11, reduce reflection
The integral thickness of structure 4 and light guide plate 1, so that backlight module thickness further reduces.
Preferably, the upper surface of catoptric arrangement 4 can be set not higher than exiting surface 11, can be embedded in catoptric arrangement 4 and lead
Tabula rasa 1, the upper surface of catoptric arrangement 4 are not higher than exiting surface 11, and avoid makes backlight mould because catoptric arrangement 4 has certain thickness
Group integral thickness increase, thus further reduce the thickness of backlight module.
Another aspect of the present invention embodiment additionally provides a kind of display device, including the back of the body described in any of the above technical scheme
Optical mode group.Because the backlight module used in the display device of the present embodiment in each embodiment of above-mentioned backlight module with providing
Backlight module it is identical, therefore the two can solve the problem that identical technical problem, and reach identical Expected Results.
Other compositions of display device on the embodiment of the present invention etc. have been well known to those skilled in the art, herein
No longer describe in detail.
In the description of this specification, specific features, structure, material or feature can be real in any one or more
Apply and combined in an appropriate manner in example or example.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (6)
1. a kind of backlight module, including light guide plate and light source, the light guide plate includes scattering surface, exiting surface and incidence surface, described
Light source and the light guide plate are arranged on same plane, and the light source includes light-emitting window, and the light-emitting window is towards the light guide plate
Set, relative with the incidence surface, the light-emitting window projects direction along the source light and gradually increased, it is characterised in that
The light-emitting window is obliquely installed to the exiting surface and the exiting surface is anti-provided with the light that can send the light source
The reflector plate being mapped on the scattering surface；
Set on the light source formed with placed side, the placed side and the exiting surface flush, one end of the reflector plate
In on the exiting surface, the other end is overlapped on the placed side.
2. backlight module according to claim 1, it is characterised in that the scattering surface includes what is be made up of some scattering points
Scattering region.
3. backlight module according to claim 2, it is characterised in that the catoptric arrangement is on exiting surface close to described
Light source side, and be arranged at beyond drop shadow spread of the scattering region on the exiting surface.
4. backlight module according to claim 2, it is characterised in that institute is completely covered in the light that the reflector plate reflects
State scattering region.
5. according to backlight module according to any one of claims 1 to 4, it is characterised in that the light-emitting window is emitted including light
Face, the light-emitting face are parallel with the incidence surface.
6. a kind of display device, it is characterised in that including backlight module according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310412311.4A CN104421770B (en) | 2013-09-11 | 2013-09-11 | A kind of backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310412311.4A CN104421770B (en) | 2013-09-11 | 2013-09-11 | A kind of backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104421770A CN104421770A (en) | 2015-03-18 |
| CN104421770B true CN104421770B (en) | 2018-01-23 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310412311.4A Active CN104421770B (en) | 2013-09-11 | 2013-09-11 | A kind of backlight module and display device |
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| CN (1) | CN104421770B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757533A (en) * | 2016-03-03 | 2016-07-13 | 深圳市华星光电技术有限公司 | Light source, backlight module and display device |
| CN106226951B (en) * | 2016-08-08 | 2019-12-10 | 广州创维平面显示科技有限公司 | Side-in backlight module and display device |
| JP2018181729A (en) * | 2017-04-19 | 2018-11-15 | 株式会社ジャパンディスプレイ | Luminaire |
| CN107505671A (en) * | 2017-09-25 | 2017-12-22 | 京东方科技集团股份有限公司 | Backlight module, its preparation method and include its display device |
| CN107620880B (en) * | 2017-10-31 | 2020-10-16 | 武汉天马微电子有限公司 | Backlight module and display device |
| CN108254970A (en) * | 2017-12-29 | 2018-07-06 | 宁波东辉光电科技有限公司 | A kind of straight-down negative optics backlight diaphragm structure |
| CN111650684A (en) * | 2019-03-04 | 2020-09-11 | 光耀科技股份有限公司 | Light guide plate |
| CN113710952A (en) * | 2019-04-29 | 2021-11-26 | 昕诺飞控股有限公司 | Light emitting apparatus |
| CN114624810B (en) * | 2022-05-17 | 2022-08-16 | 深圳市北泰显示技术有限公司 | Backlight unit light source inclined touch screen |
| CN114624811B (en) * | 2022-05-17 | 2022-08-16 | 深圳市北泰显示技术有限公司 | Production method of display screen backlight module |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1501138A (en) * | 2002-11-18 | 2004-06-02 | 鸿富锦精密工业（深圳）有限公司 | Light transmitting board for backlight module |
| CN101464594A (en) * | 2007-12-19 | 2009-06-24 | 上海天马微电子有限公司 | Back light module unit |
| KR101106176B1 (en) * | 2009-06-29 | 2012-01-20 | 서울반도체 주식회사 | Inclined type led package and back light unit comprising the same |
| CN201540425U (en) * | 2009-07-24 | 2010-08-04 | 康佳集团股份有限公司 | Back light module device of liquid crystal display |
| JP2011238448A (en) * | 2010-05-10 | 2011-11-24 | Hitachi Consumer Electronics Co Ltd | Backlight, its manufacturing method, and liquid crystal display |
| JP2012053988A (en) * | 2010-08-31 | 2012-03-15 | Hitachi Consumer Electronics Co Ltd | Backlight unit and image display device using the same |
| CN202791686U (en) * | 2012-09-29 | 2013-03-13 | 东莞市亚星半导体有限公司 | Backlight unit of ultrathin liquid crystal screen |
-
2013
- 2013-09-11 CN CN201310412311.4A patent/CN104421770B/en active Active
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| CN104421770A (en) | 2015-03-18 |
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